arbiter/eslint.config.mjs

import { defineConfig, globalIgnores } from "eslint/config";
import typescriptEslint from "@typescript-eslint/eslint-plugin";
import globals from "globals";
import tsParser from "@typescript-eslint/parser";
import path from "node:path";
import { fileURLToPath } from "node:url";
import js from "@eslint/js";
import { FlatCompat } from "@eslint/eslintrc";

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const compat = new FlatCompat({
    baseDirectory: __dirname,
    recommendedConfig: js.configs.recommended,
    allConfig: js.configs.all
});

export default defineConfig([globalIgnores(["**/dist", "**/node_modules", "**/coverage"]), {
    extends: compat.extends(
        "eslint:recommended",
        "plugin:@typescript-eslint/recommended",
        "plugin:@typescript-eslint/recommended-requiring-type-checking",
        "prettier",
    ),

    plugins: {
        "@typescript-eslint": typescriptEslint,
    },

    languageOptions: {
        globals: {
            ...globals.node,
        },

        parser: tsParser,
        ecmaVersion: "latest",
        sourceType: "module",

        parserOptions: {
            project: "./tsconfig.json",
        },
    },

    rules: {
        "@typescript-eslint/explicit-function-return-type": "error",
        "@typescript-eslint/no-explicit-any": "error",

        "@typescript-eslint/no-unused-vars": ["error", {
            argsIgnorePattern: "^_",
        }],

        "@typescript-eslint/no-unsafe-assignment": "error",
        "@typescript-eslint/no-unsafe-member-access": "error",
        "@typescript-eslint/no-unsafe-call": "error",
        "@typescript-eslint/no-unsafe-return": "error",

        "no-console": ["error", {
            allow: ["warn", "error", "info"],
        }],

        eqeqeq: ["error", "always"],
        "no-unused-vars": "off",
        "prefer-const": "error",
        "no-var": "error",
        curly: "error",
    },
}]);